220021220331111 has 16 divisors (see below), whose sum is σ = 293978371046400. Its totient is φ = 146372450540928.

The previous prime is 220021220331079. The next prime is 220021220331127. The reversal of 220021220331111 is 111133022120022.

It is not a de Polignac number, because 220021220331111 - 2⁵ = 220021220331079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220021220330111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100407055 + ... + 102574943.

It is an arithmetic number, because the mean of its divisors is an integer number (18373648190400).

Almost surely, 2^{220021220331111} is an apocalyptic number.

220021220331111 is a deficient number, since it is larger than the sum of its proper divisors (73957150715289).

220021220331111 is a wasteful number, since it uses less digits than its factorization.

220021220331111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2238998.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 220021220331111 its reverse (111133022120022), we get a palindrome (331154242451133).

The spelling of 220021220331111 in words is "two hundred twenty trillion, twenty-one billion, two hundred twenty million, three hundred thirty-one thousand, one hundred eleven".